Some Microbes Gain Access to the Normally Axenic Central Nervous

Some microbes gain access to the normally axenic central nervous system by

A) damaging the blood-brain barrier.
B) axonal transport from infected peripheral neurons.
C) infecting macrophages which subsequently enter the CNS.
D) infecting lymph nodes in the cranium.
E) either damaging the blood-brain barrier or by axonal transport from infected peripheral neurons.